Xiaomi Portable SSD 1TB Review: Pocket-Sized Speed That Punches Way Above Its Price

Introduction

When Xiaomi announced they were entering the portable SSD market, the reaction was predictable: eye-rolls from storage purists, excitement from the Xiaomi fanbase, and cautious curiosity from everyone else. After all, Xiaomi is primarily a phone and IoT company — what business do they have making SSDs?

Plenty, as it turns out. The Xiaomi Portable SSD (512GB / 1TB / 2TB) has been a sleeper hit since its 2023 launch, earning praise from Chiphell forum enthusiasts, SMZDM deal hunters, and Bilibili reviewers alike. Let’s see if the hype is justified.

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Specifications

Spec	Detail
Capacity	512GB / 1TB / 2TB
Interface	USB 3.2 Gen 2×2 (Type-C)
Sequential Read	Up to 2013 MB/s
Sequential Write	Up to 1956 MB/s
Dimensions	77.8 × 46.5 × 7.5 mm
Weight	~60g
Enclosure	Aluminum alloy (sandblasted finish)
Controller	Silicon Motion SM2320 (single-chip)
Warranty	3 years
Price (1TB)	~$57–799 (varies by promo)
Cable	Type-C to C (short, ~20cm)

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Design: Smaller Than Your Wallet

The headline stat is this: 77.8 × 46.5 × 7.5 mm. That’s smaller than a credit card in width, barely thicker than two stacked iPhones. It’s the size of a USB stick in the shape of a SSD. At 60 grams, you’ll forget it’s in your pocket.

The aluminum alloy enclosure with sandblasted finish gives it a satisfyingly premium feel. Chiphell reviewers describe it as “like holding a precision-machined MacBook chassis.” The minimalist Xiaomi aesthetic — just a subtle logo on one side — keeps it understated.

One design choice worth noting: there’s no included carrying case or keychain loop. Given its tiny size, this feels like an oversight — this thing could easily get lost in a backpack.

Performance: ~2000MB/s in Real-World Use

The Silicon Motion SM2320 single-chip controller is an unusual but effective choice. Most portable SSDs use a separate bridge chip + M.2 SSD combo, but the SM2320 integrates everything into one chip. This saves space (helping the tiny form factor) but introduces some thermal constraints.

CrystalDiskMark results (from Zhihu teardown testing):

• Sequential Read: 2013 MB/s ✅ (matches spec)
• Sequential Write: 1956 MB/s ✅ (matches spec)
• 4K Random Read: 42 MB/s
• 4K Random Write: 118 MB/s

These numbers put it ahead of almost everything in its price bracket. The Samsung T7 (1050 MB/s) and SanDisk Extreme (1050 MB/s) are roughly half as fast. The only direct competitor with similar speeds is the Crucial X10 Pro (~2100 MB/s), which costs significantly more.

Real-world file transfers (from SMZDM testing):

• 10GB video file: ~6 seconds (read) / ~7 seconds (write)
• 50GB game folder: ~30 seconds (read) / ~35 seconds (write)
• Large photo library (20GB): ~12 seconds

The Thermal Throttling Caveat

Here’s the one catch: there’s no DRAM cache. The SM2320 controller uses Host Memory Buffer (HMB), borrowing system RAM for caching. For most everyday use — moving documents, photos, media files — this isn’t noticeable. But sustained large writes (100GB+) will trigger thermal throttling.

Testing from SMZDM’s 1TB teardown review:

• First 50GB write: Full ~1.9 GB/s
• 50–100GB write: Drops to ~800 MB/s
• 100GB+ sustained: Steadies at ~500 MB/s

“连续大文件写入会降速，没有独立缓存是主要原因。但日常使用你根本碰不到这个瓶颈。”
— SMZDM, 2023
”Large continuous file writes trigger throttling — lack of dedicated cache is the main cause. But for daily use, you’ll never hit this bottleneck.”

For 95% of users, this doesn’t matter. For video editors working with multi-hundred-gigabyte RAW footage transfers every day, it might. But that’s not really this drive’s target audience.

Chinese User Reviews (Real Quotes)

“不到半个手掌大，轻松放口袋钱包。读取2013MB/s、写入1956MB/s，完胜同价位段产品。”
— Zhihu, 2023
”Less than half a palm size, easily fits in a pocket or wallet. 2013 MB/s read, 1956 MB/s write — crushes everything at this price.”

“可以和U盘说再见了，高速且便携。就是加密软件生态比较差。”
— Chiphell
”You can say goodbye to USB sticks now — fast and portable. But the encryption software ecosystem is weak.”

“799元1TB，性价比无敌。铝合金外壳散热表现好，线材有点短。”
— JD.com
”$114.1 for 1TB, unbeatable value. The aluminum shell handles heat well. Cable is a bit short though.”

“作为游戏盘使用体验很好，《黑神话：悟空》直接装在上面玩，加载速度跟内置SSD没区别。”
— SMZDM, 2025
”Great experience as a game drive — installed Black Myth: Wukong directly on it, load times are indistinguishable from internal SSD.”

Pros & Cons

Pros ✅

• Incredibly compact — barely larger than a USB stick
• Excellent speeds — ~2000 MB/s reads beat most competitors
• Great value — 1TB at $57–799 undercuts Samsung/Crucial significantly
• Premium build — aluminum alloy, sandblasted finish
• 60g weight — virtually weightless in a bag
• Single-chip design — lower power consumption, less heat generation
• Great game drive — load times on par with internal SSDs

Cons ❌

• Sustained write throttling — no DRAM cache means drops after ~50GB continuous write
• Short cable — included Type-C cable is only ~20cm
• Weak software — encryption and management tools are barebones
• No carrying case — easy to lose in a bag
• No USB-A adapter — requires Type-C host or adapter
• Price fluctuations — $57–799 range means you need to catch a sale

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Comparison: Xiaomi vs Competitors (1TB)

Model	Read	Write	Price (¥)	Size	Weight
Xiaomi Portable SSD	~2000 MB/s	~1950 MB/s	~$57–799	Credit card	60g
Samsung T7	1050 MB/s	1000 MB/s	~$85.7–700	85×57×8mm	58g
SanDisk Extreme V2	1050 MB/s	1000 MB/s	~$71.4–650	100×52×9mm	79g
Crucial X10 Pro	2100 MB/s	2000 MB/s	~$114.3–1000	65×50×10mm	64g

The Xiaomi is roughly 2× faster than the Samsung/SanDisk at a similar or lower price. The Crucial X10 Pro matches (barely beats) its speed but costs more and has a thicker profile.

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FAQ

Q: Is this compatible with PlayStation 5 / Xbox Series X?
A: Yes, via USB. For PS5, you can store and play PS4 games directly from it. PS5 games can be stored but must be moved to internal storage to play. (This applies to all USB SSDs.)

Q: Does it work with iPhones (USB-C) and iPads?
A: Yes, iPhone 15 Pro / Pro Max and iPad Pro/Air with USB-C can read/write to it. Works great for offloading ProRes video footage on iPhone 15 Pro.

Q: How’s the encryption support?
A: Xiaomi provides basic AES-256 encryption software, but reviewers consistently rate it as “barely functional.” For security-conscious users, use third-party encryption like VeraCrypt instead.

Q: What about heat during extended use?
A: The aluminum enclosure does an adequate job. Expect surface temps of ~45–50°C during sustained writes. Throttling kicks in before temps become concerning.

Q: Is it worth waiting for a sale?
A: Absolutely. The $57 promotional price (vs $114.1 regular) transforms it from “good value” to “absolute steal.” Track pricing on SMZDM or JD.com for flash sales.

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Verdict & Rating

The Xiaomi Portable SSD is a genuinely impressive first effort from a company better known for phones than storage. The speed-to-size-to-price ratio is unmatched — you’d be hard-pressed to find a faster drive this small at this price point.

Rating: ★★★★½ (4.5 / 5)

Category	Score	Notes
Value for Money	★★★★★	Class-leading at sale price
Speed	★★★★☆	Excellent for daily use
Portability	★★★★★	Tiny and lightweight
Build Quality	★★★★☆	Premium aluminum, minimalist design
Software	★★☆☆☆	Encryption tools need work
Sustained Performance	★★★☆☆	Throttles under large writes

Best for: Photographers, videographers on a budget, PC gamers who want fast portable game storage, creative professionals who move large files daily, and anyone who wants to replace a USB stick with SSD speeds.

Skip if: You regularly transfer 100GB+ of video rushes in one session, need industrial-grade encryption, or prefer the brand recognition of Samsung/SanDisk for client-facing work.